EP0337242A1 - Automatic hydraulic adjusting valve lifter - Google Patents
Automatic hydraulic adjusting valve lifter Download PDFInfo
- Publication number
- EP0337242A1 EP0337242A1 EP89105848A EP89105848A EP0337242A1 EP 0337242 A1 EP0337242 A1 EP 0337242A1 EP 89105848 A EP89105848 A EP 89105848A EP 89105848 A EP89105848 A EP 89105848A EP 0337242 A1 EP0337242 A1 EP 0337242A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radial flange
- hollow part
- cylindrical wall
- valve tappet
- tubular hollow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 229910000639 Spring steel Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 claims 1
- 108090000623 proteins and genes Proteins 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/245—Hydraulic tappets
- F01L1/25—Hydraulic tappets between cam and valve stem
Definitions
- the invention relates to an automatically hydraulically adjusting valve tappet according to the preamble of claim 1.
- the radial flange which in particular comprises plastic and aluminum, makes it possible to dispense entirely with special fastening methods, such as welding, soldering, gluing or the like.
- the radial flange which is provided with a completely smooth outer surface, can be pressed into the likewise smooth bore of the hollow cylindrical wall with an oversize.
- the fact that the radial flange has a higher coefficient of expansion than the hollow cylindrical wall ensures that even with the temperature differences occurring during operation, this interference fit never loosens, but rather becomes firmer.
- the fact that the radial flange has a higher coefficient of expansion than the hollow cylindrical wall can at the same time be used for a further advantage.
- the radial flange forms, together with the hollow cylindrical wall, a longitudinal channel at at least one circumferential point, which extends from an oil supply bore to close to the bottom of the cup-shaped housing. This ensures that the oil reservoir cannot run dry when the engine is not running.
- valve lifters are known in which a cylindrical sleeve has been provided which is firmly connected on the one hand to the inner surface of the base and which on the other hand extends into the vicinity of the radial flange, where it has an oil inlet opening at at least one circumferential point.
- the arrangement of such an additional sleeve ensures that oil is only sucked in from the lower, air-free area of the oil storage space and transported into the actual play compensation element.
- this additional sleeve was generally butt welded against the inner surface of the floor.
- the invention has for its object to eliminate this disadvantage with simple constructive measures and in particular hardly cause additional costs and a permanent and from the floor deflections to achieve independent sealing of the sleeve against the oil reservoir.
- the invention solves this problem by the features specified in the characterizing part of claim 1.
- the tubular hollow part can, for example, have the longitudinal section profile of a tubular bellows.
- this hollow part can also be expedient to give this hollow part a funnel-shaped longitudinal sectional profile in such a way that it rests with its one axial end near the outside diameter of the bottom and with its other axial end near the bore of the radial flange. In this way it is avoided with certainty that deflections of the bottom, which have their greatest amplitude in the center of the bottom, act on the tubular hollow part.
- the tubular hollow part can expediently consist of sheet steel, in particular of spring steel sheet, in order to ensure that the desired pretension is maintained over the entire service life.
- a centering edge can be provided on the radial flange, which cooperates positively with the associated end of the tubular hollow part and thereby ensures that it always maintains its intended position even in the radial direction.
- the end of the tubular hollow part which rests on the floor can be provided with an edge section which runs parallel to the floor and thereby not only makes line contact but also surface contact for secure liquid-tight sealing.
- valve tappet has a cup-shaped housing 1, which consists of the hollow cylindrical wall 2, which is closed by the bottom 3 at the upper end. At a distance from the floor 3, the radial flange 4 is provided in the bore of the hollow cylindrical wall 2, which receives the actual hydraulic play compensation element 6 in a longitudinally displaceable manner in a bore 5 concentric with the hollow cylindrical wall 2.
- cup-shaped housing 1 is made of steel
- the radial flange 4 is made of a polymeric material.
- the radial flange 4 is fixed in the bore of the hollow cylindrical wall 2 in such a way that the radial flange 4 has a circumferential groove 7 on its outer surface, into which a projection 8 engages.
- the radial flange 4 has an axial extension 9 which, together with the hollow cylindrical wall 2, delimits a longitudinal channel 10 which starts from an oil supply bore 11 and opens into the oil reservoir 12 near the bottom 3.
- a tubular hollow part 13 is provided, which is arranged under axial prestress between these two parts.
- the tubular hollow part 13 has the longitudinal section profile of a tubular bellows. Only one fold is provided in this example.
- the radial flange 4 has a centering edge 14 which cooperates with the lower end 15 of the tubular hollow part 13 in a form-fitting manner.
- an oil passage opening 16 in the form of a groove-shaped recess is provided in at least one circumferential location in the radial flange 4.
- the tubular hollow part has an edge section 17 which runs parallel to the floor 3 and thereby makes surface contact with the floor 3.
- the valve lifter shown in FIG. 2 differs from that according to FIG. 1 only in that the tubular hollow part has a funnel-shaped longitudinal section profile. This ensures that this hollow part rests with its one axial end near the outer diameter on the floor. As a result, deflections of the base 3 practically have no effect on the tubular hollow part 13 during operation.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Multiple-Way Valves (AREA)
- Sliding Valves (AREA)
Abstract
Bei einem sich selbsttätig hydraulisch einstellenden Ventilstößel, der aus einem tassenförmigen Gehäuse (1) besteht, welches eine hohlzylindrische Wandung 2 umfaßt, die am einen Ende durch einen Boden (3) verschlossen ist, wobei das eigentliche hydraulische Spielausgleichselement (6) in einer zu der hohlzylindrischen Wandung (2) konzentrischen Bohrung (5) eines im Abstand vom Boden (3) angeordneten Radialflansches (4) längsverschieblich geführt ist, der mit seiner Außenmantelfläche flüssigkeitsdicht in die Bohrung der hohlzylindrischen Wandung (2) eingesetzt und dort fixiert ist, ist zu dem Zweck, daß nur aus dem unteren, luftfreien Teil des Ölvorratsraumes Öl angesaugt werden kann, zwischen dem Boden (3) einerseits und dem Radialflansch (4) andererseits ein rohrförmiges Hohlteil (13) angeordnet, das mit axialer Vorspannung mit seinem einen axialen Ende am Boden (3) und mit seinen anderen axialen Ende (15) am Radialflansch (4) anliegt, wobei zwischen dem anderen Ende (15) des rohrförmigen Hohlteils (13) und dem Radialflansch (4) wenigstens eine Öldurchlaßöffnung (16) vorgesehen ist.In the case of an automatically hydraulically adjusting valve tappet, which consists of a cup-shaped housing (1) which comprises a hollow cylindrical wall 2 which is closed at one end by a base (3), the actual hydraulic play compensation element (6) in one of the Hollow cylindrical wall (2) concentric bore (5) of a radial flange (4) arranged at a distance from the bottom (3) is longitudinally displaceable, which is inserted with its outer jacket surface in the bore of the hollow cylindrical wall (2) and fixed there, is to that Purpose that only oil can be sucked from the lower, air-free part of the oil reservoir, between the bottom (3) on the one hand and the radial flange (4) on the other hand, a tubular hollow part (13) is arranged, which is axially preloaded with its one axial end on the floor (3) and with its other axial end (15) on the radial flange (4), wherein between the other end (15) of the tubular gene hollow part (13) and the radial flange (4) at least one oil passage opening (16) is provided.
Description
Die Erfindung betrifft einen sich selbsttätig hydraulisch einstellenden Ventilstößel entsprechend dem Oberbegriff des Anspruchs 1.The invention relates to an automatically hydraulically adjusting valve tappet according to the preamble of claim 1.
Ein derartiger Ventilstößel ist bereits vorgeschlagen worden. Durch die spezielle Werkstoffauswahl für den Radialflansch, die insbesondere Kunststoff und Aluminium umfaßt, ist es dabei möglich, auf besondere Befestigungsverfahren, wie Schweißen, Löten, Kleben oder dergleichen gänzlich zu verzichten. Im einfachsten Falle kann man vielmehr den mit einer völlig glatten äußeren Mantelfläche versehenen Radialflansch in die ebenfalls glatte Bohrung der hohlzylindrischen Wandung mit Übermaß einpressen. Dadurch, daß der Radialflansch einen höheren Ausdehnungskoeffizienten als die hohlzylindrische Wandung besitzt, ist sichergestellt, daß sich auch bei den im Betrieb auftretenden Temperaturdifferenzen dieser Preßverband niemals löst, sondern eher noch fester wird. Die Tatsache, daß der Radialflansch einen höheren Ausdehnungskoeffizienten als die hohlzylindrische Wandung besitzt, kann gleichzeitig für einen weiteren Vorteil ausgenutzt werden. In neuerer Zeit werden immer häufiger Motorzylinderköpfe aus Leichtmetall verwendet. Dabei tritt die nachteilige Erscheinung auf, daß mit zunehmender Erwärmung der Zylinderkopf sich mehr ausdehnt, als der aus Stahl bestehende Ventilstößel, wodurch sich das Spiel zwischen dem Ventilstößel einerseits und seiner Aufnahmebohrung andererseits vergrößert. Dies führt zu einem unerwünscht großen Öldurchsatz. Bei Anwendung der vorgeschlagenen Stößelkonstruktion kann dieser Nachteil dadurch umgangen oder wenigstens verringert werden, daß die Wanddicke der hohlzylindrischen Wandung wenigstens in dem Längsbereich, in dem der Radialflansch angeordnet ist, so dünnwandig ausgebildet ist, daß der Radialflansch bei Wärmeausdehnung in der Lage ist, die Wandung elastisch nach außen aufzuweiten. Da die Ausdehnungskoeffizienten von Leichtmetall einerseits und geeignetem Kunststoff, z. B. Polyethersulfon andererseits annähernd gleich sind, läßt sich so erreichen, daß das Spiel des Ventilstößels in seiner Führungsbohrung in allen Temperaturbereichen wenigstens annähernd konstant bleibt.Such a valve lifter has already been proposed. The special selection of materials for the radial flange, which in particular comprises plastic and aluminum, makes it possible to dispense entirely with special fastening methods, such as welding, soldering, gluing or the like. In the simplest case, the radial flange, which is provided with a completely smooth outer surface, can be pressed into the likewise smooth bore of the hollow cylindrical wall with an oversize. The fact that the radial flange has a higher coefficient of expansion than the hollow cylindrical wall ensures that even with the temperature differences occurring during operation, this interference fit never loosens, but rather becomes firmer. The fact that the radial flange has a higher coefficient of expansion than the hollow cylindrical wall can at the same time be used for a further advantage. In recent times, engine cylinder heads made of light metal have been used more and more. The disadvantageous phenomenon occurs that with increasing heating the cylinder head expands more than the valve lifter made of steel, which increases the play between the valve lifter on the one hand and its receiving bore on the other. This leads to an undesirably large oil throughput. When using the proposed plunger construction, this disadvantage can be avoided or at least reduced by the fact that the wall thickness of the hollow cylindrical wall is at least in the longitudinal region, in which the radial flange is arranged is so thin-walled that the radial flange is able to expand the wall elastically to the outside in the event of thermal expansion. Since the expansion coefficient of light metal on the one hand and suitable plastic, e.g. B. polyethersulfone, on the other hand, are approximately the same, can be achieved so that the play of the valve lifter in its guide bore remains at least approximately constant in all temperature ranges.
Bei dieser vorgeschlagenen Stößelkonstruktion hat man auch bereits vorgesehen, daß der Radialflansch zusammen mit der hohlzylindrischen Wandung an wenigstens einer Umfangsstelle einen Längskanal bildet, der ausgehend von einer Ölzuführbohrung sich bis nahe an den Boden des tassenförmigen Gehäuses erstreckt. Auf diese Weise ist sichergestellt, daß der Ölvorratsraum bei Stillstand des Motors nicht leerlaufen kann.In this proposed tappet construction, it has also been provided that the radial flange forms, together with the hollow cylindrical wall, a longitudinal channel at at least one circumferential point, which extends from an oil supply bore to close to the bottom of the cup-shaped housing. This ensures that the oil reservoir cannot run dry when the engine is not running.
Andererseits sind Ventilstößel bekannt, bei denen man eine zylindrische Hülse vorgesehen hat, die einerseits fest mit der Innenfläche des Bodens verbunden ist und die sich andererseits bis in die Nähe des Radialflansches erstreckt, wo sie an wenigstens einer Umfangsstelle eine Öleintrittsöffnung besitzt. Durch die Anordnung einer solchen zusätzlichen Hülse wird gewährleistet, daß Öl jeweils nur aus dem unteren, luftfreien Bereich des Ölvorratsraumes angesaugt und in das eigentliche Spielausgleichselement transportiert wird. Bei diesen bekannten Ausführungen war diese zusätzliche Hülse in der Regel stumpf gegen die Innenfläche des Bodens geschweißt worden. Es hat sich gezeigt, daß im Betrieb auftretende geringfügige dynamische Bodendurchbiegungen beim Auflaufen des Steuernockens die zwischen dem Boden und der Hülse befindliche Schweißnaht derart belasten, daß diese häufig nach einer gewissen Betriebsdauer bricht. Wenngleich damit der Stößel seine Funktionsfähigkeit nicht verliert, so gehen dadurch doch die Vorteile verloren, welche durch die Anordnung der Hülse erzielt werden (DE-OS 35 42 192).On the other hand, valve lifters are known in which a cylindrical sleeve has been provided which is firmly connected on the one hand to the inner surface of the base and which on the other hand extends into the vicinity of the radial flange, where it has an oil inlet opening at at least one circumferential point. The arrangement of such an additional sleeve ensures that oil is only sucked in from the lower, air-free area of the oil storage space and transported into the actual play compensation element. In these known designs, this additional sleeve was generally butt welded against the inner surface of the floor. It has been shown that slight dynamic floor deflections that occur during operation, when the control cam runs open, place such a strain on the weld seam located between the floor and the sleeve that it often breaks after a certain operating time. Although the plunger does not lose its functionality, the advantages which are achieved by the arrangement of the sleeve are lost (DE-OS 35 42 192).
Der Erfindung liegt die Aufgabe zugrunde, mit einfachen konstruktiven und insbesondere kaum Mehrkosten verursachenden Maßnahmen diesen Nachteil zu beseitigen und eine dauerhafte und von den Bodendurchbiegungen unabhängige Abdichtung der Hülse gegenüber dem Ölvorratsraum zu erreichen.The invention has for its object to eliminate this disadvantage with simple constructive measures and in particular hardly cause additional costs and a permanent and from the floor deflections to achieve independent sealing of the sleeve against the oil reservoir.
Diese Aufgabe löst die Erfindung durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale. Dadurch, daß das vorgesehene rohrförmige Hohlteil lediglich unter axialer Vorspannung einerseits am Boden und andererseits am Radialflansch anliegt, ohne daß es zusätzlicher Maßnahmen, wie Löten, Schweißen oder dergleichen bedarf, ist sichergestellt, daß einerseits jegliche Bruchgefahr ausgeschlossen und andererseits dauerhafte Öldichtheit gewährleistet ist.The invention solves this problem by the features specified in the characterizing part of claim 1. The fact that the tubular hollow part provided only rests under axial preload on the one hand on the bottom and on the other hand on the radial flange, without additional measures, such as soldering, welding or the like, ensuring that on the one hand any risk of breakage is excluded and on the other hand permanent oil tightness is ensured.
Das rohrförmige Hohlteil kann beispielsweise das Längsschnittprofil eines rohrförmigen Faltenbalges aufweisen. Es kann jedoch auch zweckmäßig sein, diesem Hohlteil ein trichterförmiges Längsschnittprofil derart zu geben, das es mit seinem einen axialen Ende in der Nähe des Außendurchmessers des Bodens und mit seinem anderen axialen Ende in der Nähe der Bohrung des Radialflansches anliegt. Auf diese Weise wird mit Sicherheit vermieden, daß Durchbiegungen des Bodens, die ihre größte Amplitude im Zentrum des Bodens haben, auf das rohrförmige Hohlteil einwirken.The tubular hollow part can, for example, have the longitudinal section profile of a tubular bellows. However, it can also be expedient to give this hollow part a funnel-shaped longitudinal sectional profile in such a way that it rests with its one axial end near the outside diameter of the bottom and with its other axial end near the bore of the radial flange. In this way it is avoided with certainty that deflections of the bottom, which have their greatest amplitude in the center of the bottom, act on the tubular hollow part.
Das rohrförmige Hohlteil kann zweckmäßigerweise aus Stahlblech, insbesondere aus Federstahlblech bestehen, um zu gewährleisten, daß die gewünschte Vorspannung über die gesamte Lebensdauer aufrechterhalten bleibt.The tubular hollow part can expediently consist of sheet steel, in particular of spring steel sheet, in order to ensure that the desired pretension is maintained over the entire service life.
An dem Radialflansch kann ein Zentrierrand vorgesehen sein, der mit dem zugehörigen Ende des rohrförmigen Hohlteils formschlüssig zusammenwirkt und dadurch gewährleistet, daß dieses seine vorgesehene Position auch in radialer Richtung stets beibehält. Das am Boden anliegende Ende des rohrförmigen Hohlteils kann mit einem Randabschnitt versehen sein, der parallel zum Boden verläuft und dadurch zur sicheren flüssigkeitsdichten Abdichtung nicht nur Linien-, sondern Flächenberührung herstellt.A centering edge can be provided on the radial flange, which cooperates positively with the associated end of the tubular hollow part and thereby ensures that it always maintains its intended position even in the radial direction. The end of the tubular hollow part which rests on the floor can be provided with an edge section which runs parallel to the floor and thereby not only makes line contact but also surface contact for secure liquid-tight sealing.
In den Zeichnungen sind Ausführungsbeispiele der Erfindung im Längsschnitt dargestellt.In the drawings, embodiments of the invention are shown in longitudinal section.
Der in Figur. 1 gezeigte Ventilstößel besitzt ein tassenförmiges Gehäuse 1, welches aus der hohlzylindrischen Wandung 2 besteht, die am oberen Ende durch den Boden 3 verschlossen ist. Im Abstand vom Boden 3 ist in der Bohrung der hohlzylindrischen Wandung 2 der Radialflansch 4 vorgesehen, welcher in einer zu der hohlzylindrischen Wandung 2 konzentrischen Bohrung 5 das eigentliche hydraulische Spielausgleichselement 6 längsverschieblich aufnimmt.The one in figure. 1 shown valve tappet has a cup-shaped housing 1, which consists of the hollow
Während das tassenförmige Gehäuse 1 aus Stahl besteht, ist der Radialflansch 4 aus einem polymeren Werkstoff hergestellt.While the cup-shaped housing 1 is made of steel, the radial flange 4 is made of a polymeric material.
Die Fixierung des Radialflansches 4 in der Bohrung der hohlzylindrischen Wandung 2 erfolgt in der Art, daß der Radialflansch 4 an seiner Außenmantelfläche eine Umfangsnut 7 aufweist, in die ein Vorsprung 8 eingreift.The radial flange 4 is fixed in the bore of the hollow
An einer Umfangsstelle weist der Radialflansch 4 eine axiale Verlängerung 9 auf, die zusammen mit der hohlzylindrischen Wandung 2 einen Längskanal 10 begrenzt, der von einer Ölzuführbohrung 11 ausgeht und in der Nähe des Bodens 3 in den Ölvorratsraum 12 mündet.At a circumferential point, the radial flange 4 has an axial extension 9 which, together with the hollow
Zwischen dem Boden 3 einerseits und dem Radialflansch 4 andererseits ist ein rohrförmiges Hohlteil 13 vorgesehen, welches unter axialer Vorspannung zwischen diesen beiden Teilen angeordnet ist. Das rohrförmige Hohlteil 13 weist in diesem Falle das Längsschnittprofil eines rohrförmigen Faltenbalges auf. Dabei ist in diesem Beispiel nur eine einzige Falte vorgesehen. Der Radialflansch 4 weist einen Zentrierrand 14 auf, der mit dem unteren Ende 15 des rohrförmigen Hohlteils 13 formschlüssig zusammenwirkt. In diesem Bereich ist an wenigstens einer Umfangsstelle in dem Radialflansch 4 eine Öldurchlaßöffnung 16 in Form einer rillenförmigen Ausnehmung vorgesehen. Am entgegengesetzten Ende weist das rohrförmige Hohlteil einen Randabschnitt 17 auf, der parallel zum Boden 3 verläuft und dadurch Flächenberührung mit dem Boden 3 herstellt.Between the bottom 3 on the one hand and the radial flange 4 on the other hand, a tubular
Der in Figur 2 dargestellte Ventilstößel unterscheidet sich von dem nach Figur 1 lediglich dadurch, daß das rohrförmige Hohlteil ein trichterförmiges Längsschnittprofil aufweist. Dadurch wird erreicht, daß dieses Hohlteil mit seinem einen axialen Ende in der Nähe des Außendurchmessers am Boden anliegt. Dadurch wirken sich Durchbiegungen des Bodens 3 im Betrieb praktisch überhaupt nicht auf das rohrförmige Hohlteil 13 aus.The valve lifter shown in FIG. 2 differs from that according to FIG. 1 only in that the tubular hollow part has a funnel-shaped longitudinal section profile. This ensures that this hollow part rests with its one axial end near the outer diameter on the floor. As a result, deflections of the base 3 practically have no effect on the tubular
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3812333A DE3812333A1 (en) | 1988-04-14 | 1988-04-14 | AUTOMATICALLY HYDRAULICALLY ADJUSTING VALVE |
DE3812333 | 1988-04-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0337242A1 true EP0337242A1 (en) | 1989-10-18 |
EP0337242B1 EP0337242B1 (en) | 1992-01-22 |
Family
ID=6351914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89105848A Expired - Lifetime EP0337242B1 (en) | 1988-04-14 | 1989-04-04 | Automatic hydraulic adjusting valve lifter |
Country Status (7)
Country | Link |
---|---|
US (1) | US4867114A (en) |
EP (1) | EP0337242B1 (en) |
JP (1) | JPH01301907A (en) |
BR (1) | BR8901793A (en) |
DE (2) | DE3812333A1 (en) |
ES (1) | ES2028400T3 (en) |
RU (1) | RU1771515C (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1229355B (en) * | 1989-05-23 | 1991-08-08 | Eaton Automotive Spa | HYDRAULIC TAPPETS WITH OIL CIRCULATION ALONG A 360 DEVELOPING PATH [ON TWO LEVELS. |
JP2782087B2 (en) * | 1989-06-02 | 1998-07-30 | 日鍛バルブ株式会社 | Direct-acting hydraulic lash adjuster |
JP2782088B2 (en) * | 1989-06-02 | 1998-07-30 | 日鍛バルブ株式会社 | Direct-acting hydraulic lash adjuster |
DE4030987A1 (en) * | 1990-10-01 | 1992-04-02 | Schaeffler Waelzlager Kg | AUTOMATICALLY HYDRAULICALLY ADJUSTING VALVE |
US5245958A (en) * | 1990-11-08 | 1993-09-21 | General Motors Corporation | Direct acting hydraulic valve lifter |
US5230308A (en) * | 1990-11-08 | 1993-07-27 | General Motors Corporation | Low mass direct acting hydraulic valve lifter |
US5119774A (en) * | 1990-11-08 | 1992-06-09 | General Motors Corporation | Direct acting hydraulic valve lifter |
DE4115668A1 (en) * | 1991-05-14 | 1992-11-19 | Bayerische Motoren Werke Ag | Valve pusher with hydraulic clearance compensation element - has insert covering only part of space between clearance compensation element and outer wall of pusher |
DE4427943A1 (en) * | 1994-08-06 | 1996-02-08 | Schaeffler Waelzlager Kg | Hydraulic lash adjuster for valve control of internal combustion engines |
DE19602012A1 (en) * | 1996-01-20 | 1997-07-24 | Schaeffler Waelzlager Kg | Valve tappets actuated by a cam of an internal combustion engine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3623638A1 (en) * | 1986-07-12 | 1988-01-14 | Schaeffler Waelzlager Kg | Self-adjusting hydraulic valve tappet |
EP0257354A1 (en) * | 1986-08-22 | 1988-03-02 | INA Wälzlager Schaeffler KG | Self-adjusting hydraulic valve tappet |
EP0272423A1 (en) * | 1986-11-22 | 1988-06-29 | INA Wälzlager Schaeffler KG | Self-adjusting hydraulic valve tappet |
DE8808771U1 (en) * | 1988-07-08 | 1989-11-02 | Josef Bohle Stiftung & Co KG, 5657 Haan | Hand tool to facilitate the breaking of glass |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4470381A (en) * | 1979-12-05 | 1984-09-11 | Eaton Corporation | Hydraulic tappet for direct-acting valve gear |
US4373477A (en) * | 1980-12-29 | 1983-02-15 | Eaton Corporation | Lash adjuster with plunger retainer |
US4397271A (en) * | 1981-03-02 | 1983-08-09 | Stanadyne, Inc. | Semi-self-contained hydraulic lash adjuster |
IT8467294A0 (en) * | 1984-03-27 | 1984-03-27 | Riv Officine Di Villar Perosa | HYDRAULIC TAPPET TO CONTROL THE MOTION OF A VALVE OF AN ENDothermic Engine |
DE3513161A1 (en) * | 1985-04-12 | 1986-10-16 | Goetze Ag, 5093 Burscheid | VALVE GAME COMPENSATION DEVICE |
US4624225A (en) * | 1985-05-03 | 1986-11-25 | Stanadyne, Inc. | Self-contained lash adjuster with diaphragm-type seal |
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1988
- 1988-04-14 DE DE3812333A patent/DE3812333A1/en not_active Withdrawn
-
1989
- 1989-02-27 US US07/316,456 patent/US4867114A/en not_active Expired - Fee Related
- 1989-04-04 EP EP89105848A patent/EP0337242B1/en not_active Expired - Lifetime
- 1989-04-04 ES ES198989105848T patent/ES2028400T3/en not_active Expired - Lifetime
- 1989-04-04 DE DE8989105848T patent/DE58900743D1/en not_active Expired - Lifetime
- 1989-04-10 RU SU894613784A patent/RU1771515C/en active
- 1989-04-13 JP JP1091990A patent/JPH01301907A/en active Granted
- 1989-04-14 BR BR898901793A patent/BR8901793A/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3623638A1 (en) * | 1986-07-12 | 1988-01-14 | Schaeffler Waelzlager Kg | Self-adjusting hydraulic valve tappet |
EP0257354A1 (en) * | 1986-08-22 | 1988-03-02 | INA Wälzlager Schaeffler KG | Self-adjusting hydraulic valve tappet |
EP0272423A1 (en) * | 1986-11-22 | 1988-06-29 | INA Wälzlager Schaeffler KG | Self-adjusting hydraulic valve tappet |
DE8808771U1 (en) * | 1988-07-08 | 1989-11-02 | Josef Bohle Stiftung & Co KG, 5657 Haan | Hand tool to facilitate the breaking of glass |
Also Published As
Publication number | Publication date |
---|---|
RU1771515C (en) | 1992-10-23 |
ES2028400T3 (en) | 1992-07-01 |
JPH0561442B2 (en) | 1993-09-06 |
US4867114A (en) | 1989-09-19 |
JPH01301907A (en) | 1989-12-06 |
DE58900743D1 (en) | 1992-03-05 |
EP0337242B1 (en) | 1992-01-22 |
BR8901793A (en) | 1989-11-28 |
DE3812333A1 (en) | 1989-10-26 |
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